Recoil-gun with a fluid brake.



Patented Aug. 24, 1909. 2 SHEETS EHEE' I' 1.

F. BUMINGHAUS. REGOIL GUN WITH A FLUID BRAKE. APPLICATION I'ILBD AUG. 2,1907:

Q aw k F. BUMINGHA S. REGOIL GUN WITH A FLUID BRAKE. APPLICATION FILEDAUG, 2, 1907.

Z SHEETS-SHEET 2.

Patented Aug". 24, 1909.-

ANDREW a. swan m. Puomumumumsns. wAsnmeru UNITED STATES PATENT OFFICE.

FRANZ BoMINGHAUs, 0F E SSEN-ON-THE-RUHR, GERMANY, ASSIGNOR T0 FRIED.KRUPP AKTIENGESELLSCHAFT, or ESSEN-ON-THE-RUHR, GERMANY.

Specification ofLetters Patent.

Patented Aug. 24, 1909.

Application filed August 2, 1907. Serial No. 386,846.

To all whom it may concern: a 7

Be it known that I, FRANZ BoMrNGHAUs, a subject of the Emperor ofGermany, and a resident of Essen-on-the-Ruhr, Germany, have inventedcertain new and useful Improvements in Recoil-Guns with a Fluid Brake,of which the following is a specification.

The present invention relates to a recoil gun with a fluid brake inwhich a part of the brake is adjustable to regulate the length ofrecoil.

Several embodiments of'the invention are shown in the accompanyingdrawings by the way of example.

Figure 1 shows those parts of one embodiment to which the inventionrelates, partly in side view and partly in vertical longitudinalsection; Fig. 2 is a section on line 22, Fig. 1, looking from the left;Fig. 3 is a partial horizontal longitudinal section on line 33, Fig. 1,looking from above; Fig. 4 is a section on line lr l, Fig. 1, lookingfrom the left; Fig. 5 shows a part of Fig. 2 but with some parts inother positions; Fig. 6 shows the other side view of Fig. 1, partly insection; Fig. 7 is a section on line 77, Fig. 6, looking from the left;Fig. 8 shows a part of another embodiment of the inven tion, in verticallongitudinal section and on an enlarged scale; Fig. 9 is a section online 99, Fig. 8, looking from the left; Fig. 10 is a view, correspondingto that shown in Fig. 8, of a third embodiment of the invention, andFig. 11 is an end view of Fig. 10, partly in section.

Reference will first be had to the embodiment shown in Figs. 1 to 7. Thegun barrel A is mounted to slide on the track carrier B, which isswingingly mounted in the cradle C through the medium of horizontaltrunnions which aremounted on arms I). The cradle is connected to thecarrier B by an elevating mechanism and can, bymeans of a lateraltraining mechanism, be swung relatively to the mount D about the axis ofthe vertical trunnion dwhich is journaled in the mount. r

The training and elevating mechanisms, which are not shown in thedrawings, may be of any suitable known construction.

The interior of the carrier B contains the fluidbrake E F and therecuperator spring L. The brake cylinder E is rigidly connected to thehorn a (Fig. 1) of the breech of V the gun barrel, while the piston rodF is rotatably but non-slidably mounted in the cap 6 which closes thecarrier. The cap 6 is connected to the track carrier in the known mannerso asto be easily and rapidly attached to and detached from the carrier(Fig. 3). The brake piston consists of a pistonbody F rigidly connectedto the piston rod F and a rotary disk G. For the passage of the fluidfrom one side of the piston to the other, passageways f and g areprovided in the piston body F and in the rotary disk G. A projection 9(Figs. 2 and 5) on the disk Gr engages in a curved groove 6 cut in thewall of the brake cylinder.

Within the carrier B a shaft H is journaled in bearings b on thecarrier. The shaft H extends parallel to the piston rod F and can beoperatively connected thereto by'means of a toothed sector J to befitted on the squared portion 72. of the shaft H and a toothed wheel Fwhich is non-rotatably mounted on the piston rod F. That end of theshaft H which nearest the breech of the gun barrel is provided with anarm K which projects through a slot 79 in the carrier B and in one ofthe trunnion arms I) and terminates in a ball pivot is which isjournaled in one end 712/ of a link M which has its other end m formedwith a bearing for a second ball pivot 12.. The pivot 02' is located ona bolt N secured in the cradle C.

clearly shown in the drawings and particular attention is to be paid'tothe fact that both bolt joints (10 m and a m are eccentrically disposedrelatively to the axis of the horizontal trunnions. i

In the track carrier B a second shaft P is arranged symmetrically to theshaft H in bearings (9 Toward the cap the shaft P terminates in asquared portion 39 (Figs. 3 and 4), which corresponds to the squaredportionh' of the shaft H. On that end of the shaft P which is nearestthe breech of the gun barrel is mounted a bevel wheel sector Q, (Figs.2, 3 and 6), which projects through a slot (Fig. 6) in the track carrierBand meshes with a bevel wheel sector R journaled on the outer wall ofthe track carrier B. On the sector R is arranged an adjusting lever B(Figs. 3 and 6) which carries a catch 1 actuated by a spring 9*. Theadjusting lever B and the shaft P can be secured in three differentangular po- The arrangement of the partsK, M, N is 'sitions through themedium of the catch 1' vwill be automatically adjusted when the gunbarrel is elevated, as will be shown in the following explanation, inwhich it will be assumed that the brake has the adjustment which is mostclearly shown in Figs. 1 and 2. This adjustment gives the longestrecoil, as the passageways g of the rotary disk G completely registerwith the passageways f of the piston body F. If now the gun barrel iselevated the arm K and the link M are carried along therewith and thelink M swings about the center of the ball pivot n, as the cradle C doesnot partake of the movement of the gun barrel. During the elevating ofthe gun barrel, the center of the bolt pivot k therefore moves along thearc a:m (Fig. 1), that is to say, it moves toward the axis of thetrunnions and this re sults in the arm K effecting a swinging movementin the direction of the arrow y (Fig. 2). During this proceeding a smallmovement takes place in the two ball joints (76 m and n m The turningmovement of the arm K is partaken of by the shaft H and, through themedium of the gear J F, by the piston rod F which, together with thepiston body F, turns in the direction of the arrow 2 (Figs. 2 and 4). Ifthe gun barrel is elevated about 50, the arm K moves to the positionshown in Fig. 5 in which the passageways g are about half covered by thepiston body F and the recoiling parts of the gun will therefore come torest when they have moved about half the way of the longest recoil.

It is evident that for each elevation between O and 50 a recoilcorresponds which lies between the longest and that which is obtained bythe adjustment shown in Fig. 5.

If it is desired to adjust the brake by hand, which for instance may benecessary when those parts of the automatic adjusting device that arelocated outside of the track carrier become damaged, the cap (2 isremoved and the toothed sector J is taken oli the shaft H. In theposition shown in Fig. 6 of the adjusting lever B, and if necessaryafter the piston rod F has been adjusted by means of a key placed on asquare 7 of the piston rod, the sector J is then inserted on the squaredportion 79 of the shaft P in such a manner that the tooth of the sectorJ that has a mark 2" (Fig. 4) enters into engagement with the gap of thetoothed wheel F 3 that has a mark 7 (see the position of the sector Jindicated in dotted lines in Fig. 4 and in full lines in Fig. 7). Themarks 2" are arranged in such a manner that the brake is adjusted to thelongest recoil when the catch 7 engages in the notches t of theadjustment arcs T and the tooth of the sector J having the mark 2"engages with the gap of the toothed wheel F having the mark 7; When thesector J has been placed on the squared portion p, the cap 6 is againplaced on the track carrier D.

If it is desired to adjust the brake by hand to the recoil which resultsfrom the adjustment shown in Fig. 5, the locking device 9 t is releasedand the adjusting lever R is swung upwardly and the catch 1* broughtinto engagement with the notches t The turning movement of the'adjustinglever is partaken of by the piston rod F and piston body F through themedium of the gears R Q and J F 3 and the piston rod and the piston bodyturn in the direction of the arrow at (Fig. 7), that is to say, theyturn in the same direction as when the gun barrel is elevated.

If the catch 1' is brought into engagement with the notches t the brakeis adjusted to a recoil which lies between the longest recoil and thatwhich is obtained by the adjustment shown in Fig. 5.

In the embodiment shown in Figs. 8 and 9, a non-rotatable square pin Sfor the toothed sector J is arranged on the inner wall of the trackcarrier B in lieu of the shaft P. Furthermore, several gaps between theteeth of the toothed wheel F have marks f, at which indications forseveral lengths of recoil are provided (not shown in the drawings). Ifthe brake is to be adjusted by hand the cap 6 of the track carrier isfirst taken off and the toothed sector J is then removed from the shaftH. By means of a key inserted on the squared portion f* the piston rod Fis then turned until, when the sector J is inserted on the pin S, thetooth of the sector J having the mark 2" engages with the gap of thetoothed wheel F that has its mark f carrying the designationcorresponding to the desired length of recoil. Vhen the sector J isinserted on the pin S the piston rod F is held against rotation.

In the embodiment shown in Figs. 10 and 11, the free end of the pistonrod F carries a nut V which is prevented from turning on the piston rodby a key 1). The nut is retatably but non-slidably arranged in the cap 6and has a dish-shaped head a and terminates in a square portion '0 Underthe head 12. of the nut V a bolt IV is rotatab'ly and non-slidablyarranged in the cap (9 The bolt IV has an extension to and is under theaction of a spring 'w For the lateral extension w two notches I), b areprovided in the cap 6 and three notches o are providedin a collar of thenut V. At the marks '0 designations for different lengths of recoil areprovided (not shown in the drawings). Ifthe brake is to be automaticallyadjusted the bolt IV is given such an angular position that its lateralextension w engages in the notch 6 The piston rod with the nut V canthen be turned through the medium of the shaft H and the gear J F If,however, the brake is to be adjusted by hand the key a is first'removedand the nut is turned loose, whereupon the cap 6 is removed from thetrack carrier B and the toothed sector J is-taken out. The cap 6 and thenut V are then again put in place and by means of a key inserted on thesquared portion 12 the piston rod F is turned until the notch bregisters with that one of the notches e which has the indicationcorresponding to the desired length of recoil. Finally the extension wof the bolt W is brought into engagement with the notch b and theaforesaid notch o*. The piston rod F is then held against rotation.

The dish-shaped head of the nut V protects the bolt WV and the notchesprovided for its cam w against injury from bullets and fragments ofprojectiles.

The invention is also adapted for guns in which another part of thebrake is adjustable to regulate the length of recoil.

Having thus described the invention, what is claimed and desired to besecured by Letters Patent, is: V

1. In a barrel recoil gun, a fluid brake having a part adjustable toregulate the length of the recoil, a driving connection through whichthe adjustable part is adjusted, a part removable to uncouple thedriving connection from the adjustable part; said adjustable part beingcapable of adjustment independently of the driving connection whenuncoupled from said connection, and auxiliary means for regulating theadjustable part when said driving means is disconnected.

2. In a barrel recoil gun, a fluid brake having a part adjustable toregulate the length of the recoil,a driving connection through which theadjustable part is adjusted, having apart removable to uncouple thedriving connection from the adjustable part; said adjust able part beingcapable of adjustment independently of the driving connection whenuncoupled from said connection, and means for securing said adjustablepart in a plurality of angularpositions when the part is adjustedindependently of the driving connection.

3. In a barrel recoil gun, a fluid brake having a part adjustable toregulate the length of the recoil, a driving connection through whichsaid adjustable part is automatically adjusted by the elevating movementof the gun barrel, said connection having a part removable to uncouplethe adjustable part from the driving connection, and means for securingsaid adjustable part in a plurality of angular positions when theadjustable part is uncoupled from its driving connection.

4. In a barrel recoil gun, a fluid brake having a part adjustable toregulate the length of recoil, a plurality of driving connections, andmeans whereby either of said driving connections may be coupled to saidadjustable part. to effect the adjustment of the part.

5. In a barrel recoil gun, a fluid brake having a part adjustable toregulate the length of recoil, means for eflecting the automaticadjustment of the brake during the elevation of the gun barrel, means toadjust the brake independently of the first named means and meanswhereby either of said adjusting means may be coupled to said adjustablepart to effect the adjustment of the part.

6. In a barrel recoil gun, a fluid brake having a part adjustable toregulate the length of recoil, means for effecting the automaticadjustment of the brake during the elevation of the gun barrel, means toadjust the brake independently of the first named means, embodying ahandle arranged in the proximity of the breech of the gun barrel andmeans whereby either of said adjusting means may be coupled to saidadjustable part to effect the adjustment of the part.

7. In a barrel recoil gun, a fluid brake having a part adjustable toregulate the length of the recoil and a rotatable piston rod connectedto said part, a pinion secured to the piston rod, a pair of shaftsarranged on opposite sides of the pinion, means adapted to connecteither shaft with the pinion, means connected to one of said shafts toeffect the automatic adjustment of the brake, and means for adjustingthe brake through the medium of the other shaft.

8. In a barrel recoil gun with fluid brake having a part adjustable forthe purpose of regulating the length of recoil, means for automaticallyadjusting the brake during the elevation of the gun barrel, and a secondmeans for adjustingsaid brake independently of the first named adjustingmeans, and having'a device constituting a shield.

The foregoing specification signed at Dusseldorf, Germany, this eighthday of July,

FRANZ BOMINGHAUS. In presence of- M. ENGELS,

ALFRED POHLMEYER.

